US1976642A

US1976642A - Pump

Info

Publication number: US1976642A
Application number: US711662A
Authority: US
Inventors: Walker Charles Bell
Original assignee: Individual
Current assignee: Individual
Priority date: 1932-12-24
Filing date: 1934-02-17
Publication date: 1934-10-09
Anticipated expiration: 1951-10-09

Description

Patented Oct. 9, 1934 PUMP Charles Bell Walker, Banbury, England Application February 17, 1934, Serial No. 711,662

In Great Britain 2 Claims.

This invention relates more especially to means for supplying water under high pressure for car washing, but is applicable also to supplying water I for other purposes and to supplying compressed air for inating tyres or other purposes.

The object of the invention is to provide a pumping unit which can be applied at will toV the motor vehicle in driving association with the vehicle engine, for supplying water or air or both.

- Preferably the driving shaft of the pump is coupled to the front of the engine shaft of a motor in the position usually occupied byv the starting handle, the arrangement being such that the action of pushing the pump into operative position automatically establishes the driving connection and locks the casing of the pump against rotation, in such position that it may be run by the vehicle-engine at the speed required.

In the case of many motor vehicles the shank of the starting handle passes through a bearing or support carried by the vehicle, and a peg or pegs of the inner end of the handle shank is or are adapted to engage with one-way slanted teeth or notches on the forward end of the engine shaft or a fitting which is screwed or otherwise secured thereto. In other cases the peg is on the engine shaft and the teeth or notches on the starting handle. In either case the means for coupling the rear end of the pump shaft to the engine shaft may be similar to those for coupling the starting handle to the engine shaft but they must, of course, be such that they will transmit drive from the engine shaft to the pump shaft.

The coupling between the pump shaft and the i engine shaft may alternatively comprise a quick thread on the one part screwing into a counterpart thread on the other part.

The pump casing has a rearwardly extending tube to act as a bearing for the pump shaft, and also adapted to enter, as a sliding t, into the said bearing or support which normally vreceives the handle shank, or into any other suitable support. Means must be provided to prevent the pump casing from revolving under torque reaction. Any convenient means may be adapted for this purpose, such as the provision of a key or projection to fit into the slot which is often provided to clear the peg on the starting handle, or an arm may be attached to the pump casing to bear against the radiator cowl or other part of the car frame. Any alternative may be adopted to prevent the pump casing from rotating.

The above method of attaching the pump need not in any way interfere with the starting handle when the pump is removed.

December 24, 1932 (Cl. 10S- 54) Any high pressure pump may be utilized in carrying out the invention, but I prefer to utilize a rotary pump in which there is a cylinder rotated about an axis which is transverse to the cylinder axis and said cylinder containing a piston rotating on an axis parallel to the axi s on which the cylinder rotates but eccentric thereto, thus ltol cause the piston to move endwise in relation to the cylinder.

A convenient application of the invention toa water pump for car washing is described with reference to the drawing herewith in which:-

Figure 1 is alrear end view of prising a rotary water pump.

Figure 2 is a longitudinal sectio a fitting comn of the fitting,

the section being taken on the

line

2, 2 of Figure In this view the part comprising the short shaft and slipper head for supporting-the piston is shown in elevation.

Figure 3 is a section taken in `cated by the line 3, 3, of Figure 2 the plane indi- `and looking in the direction of the arrow of that figure.

Figure 4 is a o being taken in the plane indicate 4, of Figure 1. In this view also port is shown in elevation.

sectionalplan view, the section d bytheline 4, the piston sup- Figure 5 is a view corresponding to Figure 4 but showing in section a fitting secured to the front end of the engine shaft. and engaging rear end of the pump shaft.

Figure 6 is a section taken inthe plane inclicated by the

line

6, 6, of Figures 4 and 5. Figure '7 is a view in front elevation to illustrate the shape of a recess in a motor vehicle; and

front plate of a Figure 8 is a sectional view to illustrate an alternative form of coupling between the pump shaft and the engine shaft.

Referring to Figures 1 to 7, A

tary pump of a type prises a casing B divide indicates a roalready known. It comd into two portions b b',

the latter having a rearward tubular extension which The portions b b' are secured together by wn. C is a ror bore c (which is adapted to piston c which has a transverse slot c2 in which slides a slipper c3 stud a which rotates in pins d to a flange e ofa shaft the tube b2.

integral with an eccentrically mounted a bearing a' in the fore end of the casing. The block C is secured by E rotatable in The flange e and the forward face of the shaft E form one of the cylinder walls.

The effect of rotating the shaft E is to rotate the cylinder block andY cause the piston to move endwise in relation to the cylinder in a manner already known. At the sides of the casing are two ports, one an outlet port f and the other anv having two slanted notches it cut in its end. It will be seen that the shaft E extends a short tance beyond the tting H.

On the front end of the enginew shaft Jv screwed and pinned a hollow fitting K` (seeFigure i eration by 'alvehicle having an engine shaft and 5) with two inwardly projecting studs lc which are adapted to engage in the notches h'fofsthe fitting H. Y f

When it is required to use the pump', such as for car washing, the rear end of thetubularextension is passed in through the known recess My (see Figure 7), and thenotches h; are engaged by ktherstuds lc (see Figure). v.When the pump is in this position its fins g lie lin the usual gatings m whereby theY casingcannot turnfinrela.-

tion ltothe vehicle.`v The direction ofthe'fslaint of the notches hA is-suchthat the rotation vof the engine shaft tends to keep the ,pumpnnit in place.

It will be seen that no additional parbhas to be added lto the vehiclerwhen this typegof starting handlecoupling is used. The handle simply has the notches sloped the oppositeway. The extreme end of the pump shaft E entersthe usual bore formed in'the engine shaft lfor. the purpose of centralizing the handlefor pump shaft; P (seeFigure 3) indicates a known form ofby- Y pass valve which by-passes water from the outlet port to the inlet port should the pressure become excessive such for instance as would be the vcase if the water jet nozzle became stopped up.v

The modiiications shownpin Figure` 8 is adapty f ed to a vehicle in which teethV or notches are 'f. .u Y v l Y auVv fes 1 vided [with side walls provided on the front end of the engine shaft to receive radial studs of the end of the starting handle. In this case, a sleeve Q is screwed and pegged over the front end of the engine shaft and in such position as to project forwards of the end of the engine shaft. In such extended portion q are cut notches q adapted to engage radial studs r A.of the. rear end of the pump shaft E, suchfstuds, of course, projecting radially outwards further than the radial studs of the starting handle, the latter being such that they can pass into the extension q without entering the notches q.

" What I claim and desire to secure by Letters Patentis.- v

'1. A rotary pump for attachment to and opaA fixed member provided with an opening in itsVsida-saidpump comprising a casing, ka movable `pumping `member within said casing, and apump shaft connected to said pumping memberand -having a portion adapted to extend through ksaid opening, means on the end of said shaft portion' engageable by relative longitudinal movement between the shaft portion and the engine shaft to engage the end of the engine shaft, said last meansholding Ysaid pump shaft against said engine'shaft'when the engine shaft is rotating,V said casing having a portion surrlcundingrsaid shaftand adapted to extend intol said opening, said last portion having a vrib adapted to enter lsaid notch and thereby to lock the casing against rotation. 4A2. In an arrangement according toclaim 1 wherein 4vthe engine shaft has pins thereon arranged radially withrespect thereto, said engagingmeans comprising a member on the end of saidfshaft portion having a notch therein prol 1 both of which slope with respect to the axis of the shaft portion.

CHARLES BELL WALKER.